package com.manman.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.manman.eduService.entity.EduSubject;
import com.manman.eduService.entity.excel.SubjectData;
import com.manman.eduService.service.EduSubjectService;
import com.manman.serviceBase.exception.GuException;

public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {
    // 因为 SubjectExcelListener 不能交给 spring 进行管理，需要自己 new，不能注入其他对象

    public EduSubjectService subjectService;

    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

    // 读取 excel 内容
    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if (subjectData == null) {
            throw new GuException(20001, "文件数据为空");
        }

        // 一行一行读取，每次读取有两个值，第一个值一级分类，第二个值二级分类
        // 判断一级分类是否重复
        EduSubject existOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if (existOneSubject == null) {
            // 没有相同的一级分类，添加
            existOneSubject = new EduSubject();
            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            subjectService.save(existOneSubject);
        }

        // 获取一级分类 ID 值
        String pid = existOneSubject.getId();
        // 判断二级分类是否重复
        EduSubject existTwoSubject = this.existTwoSubject(subjectService, subjectData.getTwoSubjectName(), pid);
        if (existTwoSubject == null) {
            existTwoSubject = new EduSubject();
            existTwoSubject.setParentId(pid);
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());
            subjectService.save(existTwoSubject);
        }
    }

    // 判断一级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService, String name) {
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title", name);
        wrapper.eq("parent_id", "0");
        EduSubject one = subjectService.getOne(wrapper);
        return one;
    }

    // 判断二级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService subjectService, String name, String pid) {
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title", name);
        wrapper.eq("parent_id", pid);
        EduSubject two = subjectService.getOne(wrapper);
        return two;
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
